Santa Clara River Estuary

Waterbody ID (WBID): CAE4031100020000229171211
County / counties: Ventura
Regional Water Board: Regional Board 4 - Los Angeles Region
Waterbody type: Estuary
Condition category: Category 5 — 303(d) listed, TMDL required
Integrated Report cycle: 2026

303(d) listings (9)

Each row is one official listing decision from Appendix A of the Final 2026 California Integrated Report. Source terminology is preserved as published.

Pollutant / stressor	Decision ID	Final listing decision	Decision status	TMDL requirement status	TMDL project	TMDL priority
AmmoniaNutrients	150466	Do Not Delist from 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
ChemAPesticides	69282	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Santa Clara River Estuary (33)	—
ChlorineToxic Inorganics	136090	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
CopperMetals	136091	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
Indicator BacteriaPathogens	70937	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Santa Clara River Coliform (23b & 34)	—
NickelMetals	136093	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
pHOther Cause	136095	List on 303(d) list (TMDL required list)	Revised	5A — TMDL still required	—	Low
ToxaphenePesticides	71340	List on 303(d) list (being addressed by USEPA approved TMDL)	Original	5B — Addressed by USEPA-approved TMDL	Santa Clara River Estuary (33)	—
ToxicityTotal Toxics	70337	List on 303(d) list (TMDL required list)	Original	5A — TMDL still required	—	Low

Source & provenance

Agency: California State Water Resources Control Board
Report: Final 2026 California Integrated Report
Dataset: Appendix A — 2026 303(d) List of Impaired Waters
Imported: Aug 21, 2026, 12:44 AM UTC
Waterbody ID: CAE4031100020000229171211
CALWNUM: 4403.100000, 4407.000000, 4410.000000
WBD code: 180701020904, 180701030202
Geometry: Official Water Board GIS (CA_WATERBOARDS_GIS_FINAL_2026)

View official Water Board fact sheet ↗Download Appendix A source file ↗

Location

Official 2026 Water Board geometry. Demonstration facility markers are shown for context only.

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Watershed: —
Assessed size: 100.07 Acres

Industrial permits with stated TMDL requirements (1)

Facilities whose SMARTS industrial permit carries a TMDL requirement that names this waterbody.

Official record — SMARTS TMDL dataset, State Water Board

Permits: 1
Stated requirements: 3
Regulated parameters: Enterococci MPN, Fecal Coliform, Total Coliform

Ventura Water Reclamation Facility VWRF

4 56I021734 · Active

Santa Clara River Bacteria

Parameters Enterococci MPN, Fecal Coliform, Total Coliform

Stated limits 3

TMDL names, parameters and permit identifiers are stated by the Water Board in SMARTS. The association of a stated receiving-water name to this 2026 303(d) waterbody is a derived exact-name match, and the list is limited to the first 100 permits. No exceedance, violation or compliance conclusion is drawn.

Facilities with an NAL exceedance for a listed pollutant (11)

Geographically associated industrial stormwater facilities whose reported results exceeded an Industrial General Permit Numeric Action Level for a pollutant this waterbody is listed for.

Derived

Allied Beverages4 56I028704

pH · most recent exceedance RY 2023 · association: derived watershed association

Anacapa Boatyard4 56I025025

Copper · most recent exceedance RY 2025 · association: derived watershed association

Gold Coast Recycling and Transfer Station Inc4 56I004467

Copper · most recent exceedance RY 2021 · association: derived watershed association

Naval Base Ventura County Port Hueneme4 56I013434

Copper · most recent exceedance RY 2025 · association: derived watershed association

Pegasus Transportation4 56I024328

pH · most recent exceedance RY 2016 · association: derived watershed association

Reyes Coca Cola Bottling LLC4 56I027436

pH · most recent exceedance RY 2023 · association: derived watershed association

SA Recycling LLC4 56I009899

Copper · most recent exceedance RY 2021 · association: derived watershed association

Saticoy Facility4 56I005204

pH · most recent exceedance RY 2015 · association: derived watershed association

Silver Bay Seafoods dba Ventura Harbor Boat Yard4 56I028401

Copper · most recent exceedance RY 2022 · association: derived nearby in watershed

Tri County Truck Co4 56I016719

pH · most recent exceedance RY 2023 · association: derived watershed association

Wiggins Lift Co4 56I017490

Copper, pH · most recent exceedance RY 2020 · association: derived watershed association

This is derived co-occurrence between a calculated NAL comparison and the official 303(d) listing for this waterbody. An NAL exceedance triggers Exceedance Response Actions under the permit; it is not a violation and does not establish that any facility caused or contributed to this impairment.

Derived facility associations

Industrial stormwater facilities geographically associated with this waterbody. These are derived spatial associations, not Water Board findings.

Derived

3D TEK CNC INC

Ventura · No Exposure Certification

derived_watershed_association